Portion Size You will receive 1 giant Val with roots, at least 20cm in length. Description Giant Vallisneria is an amazing plant. It is one of those plants you must get as a beginner as it will grow crazy in a dirted fish tank. However, Giant Val also does great in a tank without dirt. I have seen it in low light tanks with low nutrients in the substrate. Giant Vallisneria can absorb pollutants such as ammonia and use it as a source of nitrogen. Ammonia is a byproduct of fish waste that becomes deadly in high concentrations. Quick Stats Scientific Name: Vallisneria Australis Care Level: Easy Growth Rate: Fast Tank Placement: Background, will reach top of your tank Lighting Requirement: Will thrive in medium to bright light Ideal Temperature: 12°-28°C) pH: 7.5-8.0 CO2: No Substrate: Yes